Locking sleeve



FIG. 1 is a front, right, top perspective view of a locking sleeve showing our new design;

FIG. 2 is a rear, left, bottom perspective view thereof;

FIG. 3 is a front, left, bottom perspective view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a right side view thereof, with the left side view being a mirror image thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines of even length shown in the drawings depict portions of the locking sleeve that form no part of the claimed design. 

CLAIM The ornamental design for a locking sleeve, as shown and described. 